Multilin 735/737 - GE Grid Solutions

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Multilin 735/737

Feeder protection system

MultilinTM 735/737 is a microprocessor based relay used to perform primary circuit protection on distribution networks at any voltage level. Protection features include three phase timed overcurrent, phase instantaneous overcurrent, ground timed overcurrent, and ground instantaneous overcurrent. Each protection element can be selectively enabled by the front panel dial settings. Flexible settings and selec-table curve shapes enable accurate coordination with other devices. Installation and maintenance costs are lower when the 735/737 is used instead of the 8 separate overcurrent protection devices it has been designed to replace.

The 735/737 feeder relays are being discontinued. You may still purchase these relays until December 29, 2017. The suggested replacement device is the Multilin 8 Series. Customers can easily upgrade to the Multilin 850 feeder protection system using the Retrofit Kit. Learn more at 850.

Key Benefits

? Minimize replacement time - Draw-out construction ? Simplify testing - Built in simulation features ? Access information - via Modbus RTU

Applications

? Primary circuit protection on distribution networks at any voltage level ? Backup protection for transformers and transmission lines

Protection and Control

? Protection and Control ? 3 phase time overcurrent ? Ground time overcurrent ? 5 curve shapes ? 4 curve shift multipliers per curve ? 10 time multipliers per curve ? ANSI, IAC, or IEC/BS142 curves ? Phase instantaneous overcurrent ? Ground instantaneous overcurrent ? Pickup level for each overcurrent ? Outputs: trip, aux trip, service ? Aux trip: 86 lockout, ground trip ? SR737 has 8 additional output relays

Communications

? 8 LED trip indicators ? 4 LED status indicators ? Current bar graph, % of CT ? RS485 or RS422 communications ? ModBusTM RTU protocol ? Baud rate up to 19,200 bps

Monitoring & Metering

? Trip record of last 5 trips ? Pre-trip data includes currents ? True RMS sensing

EnerVista Software

? EnerVista software - an industry leading suite of software tools that simplify every aspect of working with Multilin devices

? EnerVistaTM Integrator provides easy integration of data from the 735/737 into new or existing monitoring and control systems

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735/737 Feeder Protection System

Protection

The 735/737 is a digital feeder relay designed for primary circuit protection on distribution networks of any voltage. Advanced protection features include:

Three-Phase and Ground TOC

The 735/737 provides a choice of five separate TOC curve shapes. For each curve shape 10 different time multipliers and four different curve shifts may be set. Three different curve types can be selected: ANSI, IAC, and IEC/BS142. This allows the selection of the optimum curve for coordination with equipment.

The front dials allow the user to select the curve shape, the percent of CT used for pickup value, and the time multiplier (one to 10). Option switches select the frequency, curve shift and enable the custom scheme curve type. If the pickup dial is set to OFF, the TOC is disabled.

ANSI

IAC

IEC/BS142

Moderately inv. Short time Short time Normal inverse Inverse IEC A Very inverse Very inv. IEC B Extremely inv. Extr. inv. IEC C Definite time Def. time Definite time

Phase and Ground IOC

The 735/737 has a separately adjustable IOC function. No intentional delay (35 ms maximum) is added to the instantaneous trip. A front dial allows the IOC setpoint to be set or disabled.

Functional Block Diagram

BUS

52 3 1

LOA D

735/737 FEEDER PROTECTION SYSTEM

OUTPUTS TRIP

50/51

AUX .TRIP

SERVICE

50G/ 51G

8 PICK-UP AND CAUSE OF TRIP

REL AYS (SR737 ONLY )

COMMUNIC ATION

R S422/485

803666A2.eps

Ground level and time delay can be selected for coordination with upstream devices. The ground signal is normally derived as the residual sum of the three-phase CTs, eliminating the need for an additional ground sensor. Alternatively, for more sensitive detection, an additional core balance (zero sequence) ground sensor encircling the three-phase conductors can be used.

Ground Trip/Phase Trip Separation

The custom scheme switch, programmed via the setup software, can be used to separate ground trips from phase trips. With this option selected, the auxiliary trip relay will only respond to ground faults and the main trip relay will only respond to phase faults.

Block Instantaneous on Autoreclosure

The 735/737 is capable of blocking instantaneous trips after an autoreclose operation. This prevents accidental trips caused by the high inrush currents typically experienced in these situations. The custom scheme switch allows this function to be enabled. The phase and ground instantaneous trip block time can be set from 0 to 180 seconds. Instantaneous trips are disabled for the duration of the time setting, but TOC protection is still enabled.

Lockout

The custom scheme switch can be programmed to set the auxiliary trip relay to act as an 86 Lockout relay, keeping the breaker open. To reset the lockout contacts either the front panel CLEAR key must be pressed, or a "trip reset" command must be received via the communications serial port.

Outputs

The 735/737 has three standard outputs. The main trip output is used to activate the breaker trip coil in the event of a fault. The auxiliary trip output can follow the trip relay, act as an 86 Lockout, or trip only on ground faults while the main trip output trips only on phase faults. The relay service output is used to provide the relay status.

The 737 has eight additional output relays to provide separate dry contact outputs for each overcurrent protection element.

Monitoring and Metering

The 735/737 features advanced user interfaces which can facilitate monitoring and metering. These features include:

Status LEDs The relay features LEDs that indicate normal operation, testing, and service required. When the phase or ground instantaneous or time overcurrent threshold is exceeded, a separate indicator flashes.

Latched Trip LEDs Eight separate latched indicator LEDs for instantaneous and time overcurrent remain set after a breaker trip. They can be reset with the front panel CLEAR push button.

Current Indicator To monitor load current a front panel bar graph indicator is provided. It gives an indication of 10% CT rating to 100% of CT rating in steps of 10%.

Communications

Either an RS485 or RS422 configuration is available for relay communication. This allows remote monitoring of status, currents, settings, and values present at the time of a trip using ModBus? RTU protocol. Up to 31 relays (slaves) can be connected on a twisted pair communications link to a single master (a unique address must be assigned to each slave). Baud rates of up to 19,200 bps are available. A TEST switch allows the 735/737 to accept commands for testing and training purposes, while temporarily disabling protection features.

EnerVista Software

The 735/737 comes with EnerVista; an industryleading suite of software tools that simplifies every aspect of working with Multilin devices. EnerVistaTM software is extremely easy to use and provides advanced features that help you maximize your investment in Multilin products.

EnerVista Launchpad EnerVista Launchpad is a complete set of powerful device setup and configuration tools that is included at no extra charge with the 735/737.

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735/737 Feeder Protection System

? Set up the 735/737 - and any other Multilin device - in minutes. Retrieve and view oscillography and event data at the click of a button.

? Build an instant archive on any PC of the latest Multilin manuals, service advisories, application notes, specifications or firmware for your 735/737.

? Automatic document and software version updates via the Internet and detailed e-mail notification of new releases.

EnerVista Viewpoint

EnerVista is a premium workflow-based toolset that provides engineers and technicians with everything they need to monitor, test and troubleshoot Multilin IEDs and manage settings files with ease. The 735/737 includes an evaluation version of EnerVista Viewpoint.

? The settings file changing process, automatic error checking and visual FlexlogicTM editor make creating, editing and storing setting seamless.

? Plug-and-Play monitoring automatically creates customized monitoring screens for your 735/737 - no programming required.

? Powerful testing tools help shorten your commissioning cycle

? Quickly retrieve oscillography and event data when a fault occurs

See the EnerVista Suite section for more information.

Typical Wiring

A

LINE B

C

TRIP COIL CONTROL

POWER

CIRCUIT BREAKER

52a

52a

TRIP

COIL

* TERMINATION 120 Ohm RESISTOR 1nF/50V BI-DIRECTIONAL CAPACITOR.

INPUT

INPUT

PROGRAMMABLE CONTROLLER B*

A

GROUND

SHIELDED

TWISTED PAIR *

4000 FEET MAX./ MAX. OF 32 RELAYS

RELAY CONTROL POWER

HEAVY COPPER CONDUCTOR OR BRAIDED WIRE

SWITCHGEAR GROUND BUS

ZERO SEQUENCE GROUND SENSING CONNECTION

PHASE 1 CT

PHASE 2 CT

ZERO SEQUENCE GROUND CT

PHASE 3 CT

LOAD

FOR

ALTERNATIVE CT WIRING RESIDUAL GROUND SENSING

PHASE 1 CT

PHASE 2 CT

LOAD

PHASE 3 CT

G5

G1 H1 G2 H2 G3 H3 G4 H4

AUX. TRIP TRIP

H5

G6

PHASE 1 PHASE 2 PHASE 3 GROUND CURRENT INPUT

H6

PHASE

A2

G7

g Multilin 735/737

A

Feeder Protection System TIMED

B1 A1

SERVICE

H7 G8

B2

PHASE

B

B3

TIMED

A3

H9 H10 H8 SHIELD G9 G10

RS422TX OPTION

RS485 (RS422 RX)

PHASE

A5

C

B4

TIMED

A4

B5

GND

TIMED

B6

A6

A8

PHASE

A

B7

INST

A7

H12 H11

CONTROL POWER

G11

FGND

FILTER GROUND

G12

SAFETY SGND GROUND

CHASSIS GROUND SCREW

B8

PHASE

B

B9

INST

A9

PHASE C

INST

A11 B10 A10

B11

GND INST

B12

804600D9.Adw12g

G1 H1 G2 H2 G3 H3 G4 H4

PHASE 1 PHASE 2 PHASE 3 GROUND CURRENT INPUT

PICKUP &

CAUSE OF TRIP

RELAYS

737

ONLY

804600DA.dwg

NOTE: 1) BREAKER 52a CONTACTS

SHOWN FOR BREAKER OPEN. 2) RELAY CONTACTS SHOWN WITH NO CONTROL POWER TO RELAY. 3) CTs MAY BE PLACED ON EITHER LINE OR LOAD SIDE OF CIRCUIT BREAKER TO SUIT APPLICATION.



3

Technical Specifications

PROTECTION

PHASE TIME OVERCURRENT (51)

Pickup level:

LO: 20 ? 100%/OFF

HI: 110 ? 220%/OFF % of CT rating

Curve types:

ANSI, IAC, IEC/BS142

Curve shapes:

Definite time, moderately inverse,

inverse, very inverse, extremely inverse;

see time/overcurrent curves; curves

apply up to 20 x pickup or

20 x CT, whichever is less.

Time multiplier: 10 curves 1 ? 10 for each shape,

4 shift multipliers 0.5/0.8/1/1.1

Definite time:

100 ms to 1 sec (100 ms steps)

Reset:

Time reset to zero each time current

level falls below pickup threshold

Accuracy:

Level:

?3% of setting

Time:

Greater of ?3% or ?20 ms @ >150% of

pickup

GROUND TIME OVERCURRENT (51G/51N)

Pickup level:

LO:

15 ? 55%/OFF

HI:

60 ? 100%/OFF % of CT rating

in steps of 5%

Curve types:

ANSI, IAC, IEC/BS142

Curve shapes:

Definite time, moderately inverse,

inverse, very inverse,

extremely inverse;

see time/overcurrent curves;

curves apply up to 20 x pickup or

20 x sensor (whichever is less)

Time multiplier: 10 curves 1 ? 10 for each shape,

4 shift multipliers 0.5/0.8/1/1.1

Definite time:

100 ms to 1 sec (100 ms steps)

Reset:

Time reset to zero each time current

level falls below pickup

Accuracy:

Level:

?3% of setting

Time:

Greater of ?3% or ?20 ms @ >150% of

pickup

PHASE INSTANTANEOUS (50)

Pickup level:

4/5/6/8/10/12/14/16/20/OFF x CT

Accuracy:

Level:

?3% of setting

Time:

35 ms max @ >150% of pickup setting

GROUND INSTANTANEOUS OVERCURRENT (50G/50N)

Pickup level:

0.1/0.2/0.4/0.8/1/2/4/8/16/OFF x CT

Accuracy:

Level:

?3% of setting

Time:

35 ms max @ >150% of pickup setting

MONITORING

INDICATORS Phase time overcurrent trip A,B,C (latched) Phase instantaneous overcurrent trip A,B,C (latched) Ground fault time overcurrent trip (latched) Ground fault instantaneous overcurrent trip (latched) Relay in service Service required Phase pickup Ground pickup Current level LED bar graph: 10 ? 100% of CT

OUTPUTS OUTPUT RELAYS

VOLTAGE

DC

30 VDC

Resistive 125 VDC

250 VDC

DC

30 VDC

Inductive 125 VDC

L/R=40 ms 250 VDC

AC

120 VAC

Resistive 250 VAC

AC Inductive 120 VAC

PF=0.4

250 VAC

CONFIGURATION

CONTACT MATERIAL

NUMBER

SERVICE, CAUSE OF TRIP/PICKUP

MAKE/CARRY MAKE/CARRY CONTINUOUS 0.2 S BREAK

10

30

10

10

30

0.5

10

30

0.3

10

30

5

10

30

0.25

10

30

0.15

10

30

10

10

30

10

10

30

4

10

30

3

FORM C NO/NC

SILVER ALLOY

SR735: 1 RELAY SR737: 9 RELAYS

COMMUNICATIONS RS485/RS422 port (using ModBus? protocol)

INPUTS

CURRENT INPUTS Withstand phase/ground CTs:

4 times rated current: continuous 20 times rated current: 5 sec 40 times rated current: 2 sec Sensing: True RMS; 16 samples/cycle Secondary: 1 A or 5 A (must be specified with order) Accuracy: Greater of 3% of CT primary or 3% of displayed Drift: No greater than 0.5% over 10 years

CT BURDEN

1 A inputs:

0.02 VA @ 1 A, 0.2 VA @ 5 A,

10 VA @ 20 A

5 A inputs:

0.02 VA @ 5 A, 0.2 VA @ 20 A,

10 VA @ 100 A

Conversion range: 0 ? 20 times CT primary

Frequency response: 48 ? 300 Hz ?3 dB

*Specifications subject to change without notice.

Ordering

* ****

735Standard relay with 50/51, 50G/51G protection

737

Relay with 8 additional outputs

1

1 A phase CT secondaries

5

5 A phase CT secondaries

1

1 A ground CT secondaries

5

5 A ground CT secondaries

LO

20 ? 60 VDC; 20 ? 48 VAC @ 50, 60 Hz control power

HI

90 ? 300 VDC; 70 ? 265 VAC @ 50, 60 Hz control power

485

RS485 2-wire communications (standard)

422

RS422 4-wire communications (optional)

POWER SUPPLY

CONTROL POWER

Options: LO/HI (specified when ordering)

LO range: DC = 20 to 60 V

AC = 20 to 48 V @ 48 ? 62 Hz

LO DC supply:

48 VDC nominal

HI range: DC = 88 to 300 V AC = 70 to 265 V @ 48 ? 62 Hz

HI DC supply: 125 VDC, 250 VDC nominal

Power:

10 W nominal, 25 W maximum

TRIP1, AUX TRIP

MAX MAKE/CARRY MAKE/CARRY

LOAD CONTINUOUS 0.2 S

BREAK

300 W

20

80

16

62.5 W

20

80

0.8

75 W

20

80

0.4

150 W

20

80

5

31.3 W

20

80

0.3

37.5W

20

80

0.2

2,770 VA

20

80

20

2,770 VA

20

80

20

480 VA

20

80

8

750 VA

20

80

7

FORM A NO

SILVER ALLOY

2 RELAYS

MAX LOAD

480 W 100 W 100 W 150 W 375 W 50 W 2,400 VA 5,000 VA 960 VA 1,750 VA

ENVIRONMENTAL

Operating Temperature Range:

-40? C to +70? C

TYPE TESTS

Insulation Resistance:

per IEC 255-5 (500 V DC, 2000 MW)

Dielectric Strength: per IEC 255-5 and ANSI/IEEE C37.90 (2

kV at 60 Hz for 1 minute)

Impulse Voltage: per IEC 255-5 (5 kV)

Surge Immunity: per EN 61000-4-5 (common mode 4 kV,

differential modes 2 kV)

Oscillatory Surge Withstand:

per ANSI/IEEE C37.90.1, per Ontario

Hydro A-28M-82

Voltage Dips per: IEC 61000-4-11 (0%, 40%, 70%)

Electrostatic Discharge:

per IEC 255-22-2 (4/4 kV)

Damp Heat (Humidity Cyclic):

per IEC 68-2-30 (6 days)

Make and Carry for relays:

per IEEE C37.90 (30 A)

Current Withstand: per ANSI/IEEE C37.90 (40x rated 1 A for 2

seconds; 60x rated 5 A for 1 second)

RFI Radiated Immunity:

per IEC 255-22-3 (160 MHz, 460 MHz),

per EN 61000-4-3 (10 V/m)

RFI Conducted Immunity:

per EN-61000-4-6 (10 V)

Temperature Cycle: ?40?C, +60?C (per GE internal

procedures)

Mechanical Stress: 2 g (per GE internal procedures)

Current Calibration: per GE internal procedures

10 A DC continuous relay current carry

at 80?C per GE internal procedure

PACKAGING

Weight: 15 lbs (6.8 kg) Shipping Dimensions: 15" x 14" x 14"

(38.1 cm x 35.6 cm x 35.6 cm)

Accessories

19-1 PANEL 19-2 PANEL SCI 735/737-DEMO 1 3/8" Collar:

3" Collar:

Single cutout panel Dual cutout panel RS232 to RS485 convertor 737 demo/test case For shallow switchgear, reduces the depth of the relay by 1 3/8". For shallow switchgear, reduces the depth of the relay by 3".

APPROVALS CSA: Approved under LR41286 UL: Recognized under E83849

NOTE: For dimensions see SR Family brochure.

Upgrade to the Multilin 850 for advanced feeder management, protection and control capabilities. Visit 850



IEC is a registered trademark of Commission Electrotechnique Internationale. IEEE is a registered trademark of the Institute of Electrical Electronics Engineers, Inc. Modbus is a registered trademark of Schneider Automation. NERC is a registered trademark of North American Electric Reliability Council. NIST is a registered trademark of the National Institute of Standards and Technology.

GE, the GE monogram, Multilin, FlexLogic, EnerVista and CyberSentry are trademarks of General Electric Company.

GE reserves the right to make changes to specifications of products described at any time without notice and without obligation to notify any person of such changes.

Copyright 2017, General Electric Company. All Rights Reserved.

GEA-32032(E) English 170712

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